焊管2026，Vol.49Issue(4)：58-63,69,7.DOI:10.19291/j.cnki.1001-3938.2026.04.008
X65MS埋弧焊管SSC环境下腐蚀沟槽产生原因分析
Reason Analysis for SSC Corrosion Groove of X65MS Submerged Arc Welded Pipe
摘要
Abstract
Hydrogen sulfide corrosion is the main cause of the oil and gas pipe failure.Hydrogen sulfide stress corrosion test(SSC)is conducted on a X65MS steel grade submerged arc welded pipe.It is found that numerous corrosion grooves appear on the tensile surfaces of all base materials HAZ and weld zones,all of which were perpendicular to the direction of tensile stress.By conducting tests on the physical and chemical properties,microstructure,hardness,and surface residual stress of the material,the corrosion characteristics of SSC were analysed and the reasons for the appearance of corrosion grooves in SSC samples were explored.Results show that the physical and chemical properties of the material meet the standard requirements,but there is a hard phase(M-A island structure)in the microstructure of the surface layer,and the hardness distribution is uneven,exceeding the standard specified 250HV0.3.After heat treatment of the material,the surface hardness was improved,with a maximum hardness of 226HV0.3.The residual stress on the surface decreased from 295 MPa to 123 MPa.Sampling was conducted for SSC retesting,and no corrosion grooves were found.The surface hardness and residual stress had a significant impact on the occurrence of corrosion grooves in the SSC test.By reducing hardness and controlling residual stress,the SSC performance of X65MS can be effectively improved.关键词
X65MS埋弧焊管/硫化氢应力腐蚀/腐蚀沟槽/残余应力/表面硬度Key words
X65MS SAWL/SSC/corrosion groove/residual stress/surface hardness分类
矿业与冶金引用本文复制引用
张德平,李明卓,王大成,张钊,刘雨桐..X65MS埋弧焊管SSC环境下腐蚀沟槽产生原因分析[J].焊管,2026,49(4):58-63,69,7.基金项目
新型油气勘探开发国家科技重大专项"CO2 驱大幅度提高采收率与长期封存技术"(项目编号2024ZD1406600) （项目编号2024ZD1406600）
中国石油科技项目"CCUS注采工艺、产出气循环利用及高效防腐关键技术研究"(项目编号2021ZZ01-04). （项目编号2021ZZ01-04）
